Skiving apparatus



J. T. YovANovlcH 2,816,400

SKIVING APPARATUS 3 Sheets-Sheet 1 Dec. 17, 1957 Filed April 15,' 1955Dec. 17, 1957 J. T. YOVANOVICH SKIVING APPARATUS 3 Sheets-Sheet 2INVENTOR.

JOSEPH T. YOVANOVICH ATTORNEYS Filed April 15, 1955 Dec. 17, 1957 J. T.YovANovlcH SKIVING APPARATUS 5 Sheets-Sheet 3 Filed April 15, 1955 FIG.5.

IN V EN TOR.

ATTORNEYS United States Patent O "ice SKLVINGAPPARATUS'.

Josephj'lf. Yc'ivamoviclr, -R'sernont, "'Pa'f, assigner; to` 'Pp'erResearclrtwf. Development .`2Corporati0n,'f Philadelphia, Paiyaacorpb'l'ationi of Pennsylvania Appli'cai'iirAprilllS,1955,'SerialN.,501,'698 v -8 iClaimsx. (CL' 51--1-81'7):A

This. inventioirirelates.' to 'skivinglfapparatus sand, moreparticularly; .t'on apparatus lfor;l skivin'gx. onvbeveling the edges ofammzingsstrip. offmaterial such as,:for.- example, paper.

-Inzatheiepasrf skivirig4 apparatusi'fhasxbeen: provided: fin

which: abrasive A.vi/heels `havingifeitherr` cylinfdri'cally orconically formed surfaces iare :Lniountedxiwith theirlaxes 4of rotationextendingftransverselyofuthe strip-.t'ovbeskived and'positionedwith at.;leastf' a'.vp'ortionjontlreiriz abrasive surfaee: engagingoan 'edgeportion.. .ofi the@ strip. Upontrotaionof the'abrasive'surfacQ-i aportion rofitiieiedge. ofi. the

stripL isfr'enroved'fandwithiproperriclearances.:h'eirgumainytai'ned@l'xtweerli ythe'rotating:abrasive` surfacefiand'satsupporting means fior. =the1f stripbeing rskivedi'a. .beveledmr fathened=edge1is produc'ed'on thestrip.

Operation off. the above noted types 'ofi apparatusi isattendedwith.'the.difiibu'lty-foffinaintainingsprop'erly formed `'conicalLabrasive surfaces;- `or of 'maintaining "the .proper v angularrelation:v betweenffa cylindricalzsurface andV 'a supportingifmember.Awhich/serves.to'positionfthe strip being Y skivedi inv f order thatrthe'.y 'desiredl amount ofi` rriateriah is removed'.` from': thestrip fin "order to .produce ithe beveled or feathered edge soughtiaite'r:

It? is the'.#principali7V object' of fthe presentA invention-:ttoprovide ani improved Jarrangementlfori providing a :beveled orfeathere'dedge on a Strip off novingin'i'aterialiwhiolr ."ir'rclu'desf a .rotatingcylindricala. abrasivefsurface .having :its artist-of. rotationpositioned atan ncutesangle ft'of direction of tra'velfofthe*stripyfthe' widthof contactrontherstripsand vthezfabrasive cylindrical:surface being', selected fto'V produce albevelfrex-tencling over' Iadesired.portionfothe' Widthiof i,

theflapparatu'sf showniin iFigureZ with a portionof the iapparatus':removed therefrom;

Figureu4 is afragrnentary vertical sectionthroughxthe apparatustakenfon. the trace 4'-4 ysh'owninlv'liguiferBriand Figure'fis a.perspective ofia portion'ofithesapparatus shown' iii :Figure-i4.'

Asy shown' in Figure 1,'the. apparatus includes asupporting-framework 2Von# the top of iavhich-isv mounted skiv'ing1apparatus' `indicated-.generally ati 3 "in llffigl'ire' w1 whichfwill behereirafter describedin detail; Horiiontallyl extending framing 4 is supported by theframework 1 Tand` supp'drtslat itslright-hand end, as'viewed in yFigure1 `a disc -6 and a lhub' 8 fon= which is wound a -stripi'of'n'iate'ialllI vto beiskivedzf Thehub' 8is mounted lonja shaftfli)`which is? in turn rotatably supported-v by' means 99a .bearin'gstructure114=from the'.iframing;.4. Suitable i;

2,816,400 yPatented Dec.

2. meansFincluding-a discrlsmaybe:provided to secure 'tlievhub Sand`'discitiJonth'e shaft" 10 inf any conventional manner. Afbrake 16 ispreferably provided on the shaft 101inlorder to provide/"some drag uponthe strip as it is being drawn from the hub 8 on shaft 10. The type ofunvWi-ndi'n'g-appa'rat'usi's entirely conventional and neednot be-fde`scribed inldetail'i l Atthe'` lefthandend-koi thefframing vflyasviewed in Figureflithere'i-is mounted-a 'disc -18 1and hub 20 onwhichfthe coillZlT-oftleffstr-ipt ofafmateri'al is Wound after-'itisysliivedz#r The hubl 20 isimountediorra shaft 22Which-'issupported'byftmeansitof11a-bearing structure 26 mounted on theframing!!v y Aimeto'r zoals-mounted inthe-,framing 4 and? is 'con'-nectedbyemeansl 'ot faffchainbelt 30 to drive a speed-frei du'ce` 372.1yTh/foutputl'fr'om-the-lspeed'reducer is transl niittdfthroughl`a1sprocket? Wheel `34 ltoa chain` be1tf3'6 whichasses?overfa-fspro'cket .WheelJ 38 to which there'is:ajaeentrto-'thezrolienzztolfand driven vby' a gearconnection threvvithaThefsr'olle'r1401andrthe rollers 42serve todraw the sttip'bf materialto' be-ski'ved through the skiving apparatus as will behereinafterdescribed; n l

The ichlinfbeltlli also 'passes over a sprocket 44 con-'n'eeteddlifdi'iv-ing relation Withaa clutch 46 through which wellas-ag'uifcl'effor*y the. stripv f5() Vas`= itis fed into the iskiivin'gapparatus indicated*Ygener-allyy zit-L3V` in'fFigurefl.' The stripindicatedat1543passing o'utf'bf7 thefskiving :apparatussubstantandt-raisedrcentral portions 881 andrzoutwardly yextendingportions and 92 of reducedflwidth; The portion? '92 terminates in aportion 94 which is formed at an angle to the portion 92 and is adaptedto enter the angle formed portion 86 of the slot 84. A pair of screws 96and 98 are threaded into the end portions 90 and 92 of the block 80. Theupper ends of the screws are adapted to bear against the upper surfacesof the slots 82 and 84 and thus serve to position the block verticallyin the`opening78 in the plate 62.

A plate 100 extends below the block 80 transversely thereof and is aixedto the underside of the plate 62 by a pair of bolts 102. The block 80 isprovided with a central bore within which there is positioned a spring104 which seats in the base or uppermost portion of the bore and actsagainst the plate serving to urge the block80 upwardly and thus maintainthe uppermost ends of the screws 96 and 98 in engagement with the basesof the slots 82 and S4, respectively. The enlarged central portion 88 ofthe block 80 is provided with a slot 106 extending vertically downwardlyfrom the top of the central portion 88. The uppermost surface of theenlarged portion 88 is provided with a recess adapted to engage thebeveled edges of a wear plate 108. The bolt 110 extending transverselythrough the enlarged portion 88 of the block 80 serves to clamp the wearplate 108 in the top of the portion of the block 88 by partially closingthe vertically extending slot 106.

A pin 112 extends transversely through the reduced width portion 90 ofthe block 80 and has end portions with flattened vertically extendingsides 114 which are adapted to ride in slots 116 in the adjacent sidesof the slot 82 in the plate 62. The arrangement of the pin 112 and theslots 116 serves to position the block 80 centrally within the slot 78while permitting vertical motion of the block.

A cam 118 is positioned between the upper Surface of the reduced portion94 of the block 80 and the upper surface of the slot 84. It will beevident that upon rotation of the cam 118 the left-hand end of the block80, as viewed in Figure 4, will be moved downwardly against the urgingof the spring 1414. The cam 118 is slidably but non-rotatably mounted bya sliding key and elongated keyway 119 on a shaft 120 which extendstransversely of the frame 2 and passes outwardly through the front ofthe frame, as viewed in Figure 1, and mounts a sprocket wheelover whichthere passes a chain belt 122. The chain belt 122 passes over a similarsprocket on a shaft 124 to which is attached an operating lever 126. Itwill be evident that upon depression of the lever 126 the shaft 120 willbe rotated, rotating the cam 118 and depressing the left-hand end of theblock 80 as viewed in Figure 4.

As previously noted, the mounting plate62 is slidably mounted on therods 56 and 58. The position of the lplate on these rods is adjusted bya threaded shaft 128 which is threaded into a downwardly turned flange130 ofthe plate 62. The shaft extends through the frame of ythe ymachinein which it is mounted for rotation but xed against longitudinal motion.Externally of the machine the shaft is provided with a hand wheel, notshown, by which it may be rotated.

As will be described in greater detail hereinafter, the frame 62 and theskiving apparatus indicated generally at 57 in Figure 2 mounted thereonare preferably retained iu a stationary position and a second skivingapparatus indicated generally at 59 in Figure 2 and which will now bedescribed is adjusted in order to accommodate for the strips of materialof Various widths to be skived.

The skiving apparatus indicated generally at 59 is mounted on a plate132 slidably positioned on the rods 58 and 60. A motor 134 is mounted onthe plate 132 and drives a drum 136 on the peripheral surface of whichthere is affixed a strip of abrasive material 133. A housing 140encloses a substantial portion of the drum 136 and connected to thehousing 140 is a flexible conduit 142 through which particles ofmaterial removed from the strip being skivedv are removed.

The plate 132 is provided with a cutout 144 positioned below thelowermost surface of the drum 136. A block 146 is positioned within theslot 144. The slot 144 is provided with an extended portion 148 withinwhich an extension of the block 146 is positioned. The slot 144 and theblock 146 in the skiving assembly indicated generally at 59 aresubstantially identical to the block and -cutout arrangement heretoforedescribed in connection with the skiving arrangement indicated generallyat 58 with the exception of the fact that the blocks and slots are ofright and left-hand formation respectively. A vertical section throughthe slots 144 and 148 and the block 146 would have the appearance of theparts shown in Figure 4.

The rod 124 extends through the frame of the machine and has a cam 154mounted thereon within the portion 148 of the slot 144. The cam ismounted on a sliding keyway indicated at and thus when the plate 132 ismoved longitudinally of the rods 58 and 60 the cam 154 is movabletherewith along the rod 50 while remaining rotatable by means of the rod124.

The plate 132 is movable longitudinally of the rods 58 and 60 by meansof a rod 150 which is threaded through a flange 151 on the plate 132 andis provided at its outer end with a hand Wheel 152. The rod 150 isprovided with collars, not shown, to prevent it from movinglongitudinally through the frame 2. It will be evident that uponrotation of the hand wheel 152 the plate 132 will move transversely ofthe machine and carry with it the skiving assembly indicated generallyat 59.

The strip of material to be skived indicated at 11 and 50 in Figure 1passes, as indicated at 50 in Figure 2, under the disc 136 and theabrasive surface 138 mounted thereon. A pair of spring pressure plates156 is affixed to the plate 132 and have their outer ends 158 extendingoutwardly beside the disc 136 and adapted to press the strip beingskived downwardly against the block 108 and the portion of the plate 132positioned thereunder. It will be noted from Figure 2 that the endportions 158 of these ngers extend substantially beyond the strip 50.This is, of course, to provide for the holding down of strips of greaterwidth than the strip 50 shown in the drawing. The strip leaving theskiving arrangement indicated at 59 is shown at 52 as having one edgebeveled or feathered. The strip leaving the skiving arrangementindicated generally at 57 is shown at 54 as having both edges skived. Apair of pressure ngers 160 are mounted on the plate 62 and serve to holdthe strip being skived downwardly in the region of the skivingarrangement 57.

It will be noted that each of the discs 70 and 136 is positioned withits axis of rotation forming an acute angle with the direction 4oftravel of the strip being skived. The plates 62 and 132 are sopositioned with respect to the width and position of a strip beingskived that 'the lowermost portion of the abrasive surface on each -ofthe discs is positioned so as to extend over an edge of the strip. Itwill be evident that by adjustment of the screws 96 and 98 of the block80 and by adjustment of similar vscrews in the block 146 the wear plateor platen on each of the'blocks which are identical to that indicated at108 in Figure 4 and 5 can be adjusted to press a selected portion of theedge of the strip upwardly against its associated abrasive surfaceddisc. In the particular arrangement shown in Figure 2 each of theplatens is adjusted to press the strip into engagement with the abrasivesurface of its associated disc for one-half of the longitudinal width ofthe disc. It will be evident that by variously adjusting the positionsof the plates 62 and 132 and by variously positioning the angles of thewear plates on the blocks 80 and 146 beveled or feathered edges may beprovided on the strip extending inwardly from the edges of the strip forvarious extents to `the limit as determined by the widths of theabrasive surfaces onthe discs 70 and 136. The motors 68 and 134 areconnected .soas to rotate the discs in directions such that the portionsof the surfaces of the discs engaging the strip are moving outwardly ofthe strip.

The motors 68 and 134 are connected to power through conventional motorcontrollers contained within enclosures 160 conveniently mounted on theside of the frame 2.

From the foregoing it will be evident that there is provided a skivingapparatus having a high degree of flexibility in that bevels of variouswidths may be provided on moving strips and, additionally, there isprovided a skiving apparatus in which the abrasive surface and theplaten which serves to press the Work against the abrasive surface maybe not only adjusted with facility but may be replaced with facility andwhich replacement is accompanied by a relatively small expenditure ofcost for labor and material.

What is claimed is:

1. Strip skiving apparatus comprising a pair of skiving assemblies,means for guiding a strip to be skived, each of said skiving assembliesincluding means providing a rotatable surface capable of removingmaterial from a moving strip. and means for adjusting the relativepositions of said skiving assemblies and said guiding means to positionone of said rotatable surfaces for engagement with one edge of a strippassing over said guiding means and to position the other of saidmovable surfaces for engagement with the other edge of said strip, saidskiving assemblies being mounted to position said rotatable surfaceswith their axes of rotation extending at acute angles to the line oftravel of the strip an'd the direction of travel of each of the portionsof said rotatable surfaces in engagement with the strip being towardtheir respective edges of the strip.

2. Strip skiving apparatus comprising a pair of skiving assemblies,means for guiding a strip to be skived, each of said skiving assembliesincluding means providing a rotatable surface capable of removingmaterial from a moving strip, and means for adjusting the relativepositions of said skiving assemblies and said guiding means to positionone of said rotatable surfaces for engagement with one edge of a strippassing over said guiding means and to position the other of saidmovable surfaces for engagement with the other edge of said strip, saidguiding means including separate means for positioning each of the edgesof the strip in engagement with its adjacent rotatable surface, saidpositioning means each including means pivoted inwardly of the edge of astrip in said guiding means and vertically movable outwardly of the edgeof a strip in said guiding means for adjusting the angular relationbetween said positioning means and the portion of said rotatable surfaceengaged by the strip, said skiving assemblies being mounted to positionsaid rotatable surfaces with their axes of rotation extending at acuteangles to the line of travel of the strip and the direction of travel ofeach of the portions of said rotatable surfaces in engagement with thestrip being toward their respective edges of the strip.

3. Strip skiving apparatus comprising means for positioning alongitudinally moving strip to be skived, means providing a rotatabledrum capable of removing material from a moving strip to be skived andpositioned to have a portion of its peripheral surface engaged by anedge portion of a strip positioned by said positioning means with itsaxis of rotation extending at an acute angle to the line of travel ofthe strip, movable means for holding a positioning moving strip inengagement with a 1ongitudinally axially extending substantially linearportion of the peripheral surface of the rotatable drum, means foradjusting the angular posiiton of said holding means in a planeextending substantially parallel to the axis of rotation of saidrotatable surface for adjusting the angular relation between saidholding means and the portion of said rotatable drum engaged by thestrip, and separate means for displacing said holding means away fromsaid 4. Strip skiving apparatus comprising supporting means, a pair ofskiving assemblies, means mounting said skiving assemblies forindependent parallel motion on said supporting means, and means forguiding a moving strip to be skived for movement across said supportingmeans transversely of the paths of motion of said skiving assemblies,each of said skiving assemblies including means providing a rotatablesurface capable of removing material from a moving strip, means foradjusting the relative positions of said skiving assemblies and saidsupporting means with respect to said strip guiding means to positionone of said rotatable surfaces for engagement with one edge of a strippassing over said guiding means and to position the other of saidmovable surfaces for engagement with the other edge of said strip, andadjustable holding means for positioning a selected portion of a movingstrip in said guiding means in engagement with the rotatable surfaceskiving means.

5. Strip skiving apparatus comprising supporting means, a pair ofskiving assemblies, means mounting said skiving assemblies forindependent parallel motion on said supporting means, and means forguiding a moving strip to be skived for movement across said supportingmeans transversely of the paths of motion of said skiving assemblies,each of said skiving assemblies including means providing a rotatablesurface capable of removing material from a moving strip, means foradjusting the relative positions of said skiving assemblies and saidsupporting means with respect to said strip guiding means to positionone of said rotatable surfaces for engagement with one edge of a strippassing over said guiding means and to position the other of saidmovable surfaces for engagement with the other edge of said strip,adjustable holding means for positioning a selected portion of a movingstrip in said guiding means in engagement with the rotatable surfaceskiving means, and separate means for displacing said holding means awayfrom its associated rotatable surface.

6. Strip skiving apparatus comprising means for positioning alongitudinally moving strip to be skived, means providing a rotatabledrum capable of removing material from a moving strip to be skived andpositioned to have a portion of its peripheral surface engaged by anedge portion of a strip positioned by said positioning means with itsaxis of rotation extending at an acute angle to the line of travel ofthe strip, movable means for holding a positioned moving strip inengagement with a portion of the peripheral surface of the rotatabledrum, means for adjusting the angular position of said holding means ina plane extending substantially parallel to the axis of rotation of saidrotatable drum for adjusting the angular relation between said holdingmeans and the portion of said rotatable drum engaged by the strip.

7. Apparatus in accordance with claim 6 in which said movable meansholds a positioned moving strip in engagement with a longitudinallyaxially extending substantially linear portion of the peripheral surfaceof the rotating drum.

8. Apparatus in accordance with claim 6 including separate means fordisplacing said holding means away from said drum.

References Cited in the le of this patent UNITED STATES PATENTS 231,146Briggs Aug. 17, 1880 1,060,759 Heldmann May 6, 1913 2,120,835 GordonJune 14, 1938 2,217,306 Burrill Oct. 8, 1940 2,277,373 Somes Mar. 24,1942 2,392,375 Gardella Jan. 8, 1946 2,504,923 Emmons et al. Apr. 18,1950 2,553,432 Vendien May 15, 1951 2,671,991 Thorsell Mar. 16, 1954

